No Ringback on VOIP calls when calling to an Ericsson Phone

[dcharlier]

Config

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CCM version 3.1.(4)

VG200 with IOS 12.2(11)T with E1 card

IP Phones <=> E1 <=> VG200 <=> E1 <=> MD110 <=> E1 <=> PSTN

we followed the document : PBX Interop. with MD 110 (E1) (documented for an 2610 router)

Problem

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We do not have any ringback when calling an Ericsson Phone from an IP Phone.

We tried the different progress_ind settings, ...

After this, I configured the VG200 as an MGCP gateway, but with the same result : no ringback.

Strange thing : when we call an analog PSTN phone from an IP Phone through the Ericsson PABX, we do have ringback tone , allthough the PI is exact the same.

Please give your comments on this, if you experienced the same ...

Many Thanks

Dirk

[msmith]

Dirk: we run VG200 with NM-HDV to act as "tie" lines between our Ericsson MD110 ver 9.0 and Cisco. We go with the H323 setup and the following is a

dial-plan we use:

IP Phones <=> VG200 <=>T1 <=> MD110 <=> Ericsson Phone

dial-peer voice 1 voip

preference 1

destination-pattern [1-7]...

progress_ind setup enable 3

session target ipv4:nnn.nnn.nnn.nnn

dtmf-relay cisco-rtp h245-signal h245-alphanumeric

codec g711ulaw

ip precedence 5

Hope this helps. marc

[msmith]

Dirk: sorry got the wrong dial-plan:

dial-peer voice 100 pots

preference 3

destination-pattern [1-7]...

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

port 1/0:23

forward-digits all

[mcnerney]

Dirk

You might check on your VG200 Gateway configuration. there is a parameter called: Setup non-ISDN Progress Indicator IE Enable. This paramter has a note at the bottom of the page that says: May be required to force ringback from some PBX's.

You might give that a try.

[dcharlier]

I tried that one , no success ...

Anyway, Thanks for the feedback !!!

[mcnerney]

Dirk

Would you print the commands you have in the VG200 under the header MGCP.